Static information storage and retrieval – Read/write circuit – Signals
Reexamination Certificate
2005-01-18
2005-01-18
Elms, Richard (Department: 2824)
Static information storage and retrieval
Read/write circuit
Signals
C365S196000, C365S210130
Reexamination Certificate
active
06845049
ABSTRACT:
A semiconductor memory device with a bit line sense enable signal generating circuit is disclosed. The semiconductor memory device includes a word line selection signal generating circuit for generating a word line selection signal for selecting a word line; a delay circuit for generating a delayed signal by delaying a signal to the same extent of time period which is needed for the word line selection signal generating circuit to generate the word line selection signal; and a Schmitt trigger for generating a word line enable detecting signal by receiving an output signal from the delay circuit and that is connected to a power supply voltage which has the same voltage level as the voltage level used to enable the word line. The bit line sense enable signal generating circuit in the present invention occupies a relatively smaller layout area than that of conventional semiconductor memory devices. Furthermore, the generating circuit generates a bit line sense enable signal with constant delay time that is immune from process changes, voltage fluctuations, and temperature fluctuations.
REFERENCES:
patent: 5465232 (1995-11-01), Ong et al.
patent: 6285604 (2001-09-01), Chang
patent: 6577548 (2003-06-01), Barth et al.
Kang Young-Gu
Lee Jong-Won
Lim Kyu-Nam
Shim Jae-Yoon
Yoo Jei-Hwan
Elms Richard
Le Toan
Marger Johnson & McCollom
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